/*
 *	This file is part of video_metadata.
 *
 *	video_metadata is free software: you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation, either version 3 of the License, or
 *	(at your option) any later version.
 *
 *	video_metadata is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with video_metadata.  If not, see <https://www.gnu.org/licenses/>.
 */


const SCAN_URL = '/video_metadata/admin.php?action=scan';


function displayPathInfo(path_info)
{
	const DEPTH_NAMES = ['depth_0', 'depth_1', 'depth_2', 'depth_3', 'depth_4', 'depth_5'];

	let frag = document.createDocumentFragment();
	let line_item = document.createElement('li');
	let sub_list = document.createElement('ul');
	frag.appendChild(line_item.appendChild(sub_list));

	if (path_info.path_type == 'directory') {
		sub_list.classList.add('directory');
	} else if (path_info.path_type == 'file') {
		sub_list.classList.add('file');
		sub_list.classList.add(((path_info.media_type == '') ? 'none' : path_info.media_type));
	}
	if (path_info.media_type == 'unknown')
		sub_list.classList.add('unknown');

	sub_list.classList.add(DEPTH_NAMES[path_info.depth]);

	let bn = document.createElement('li');
	bn.textContent = 'base_name: ' + path_info.base_name;
	sub_list.appendChild(bn);

	let mt = document.createElement('li');
	mt.textContent = 'media_type: ' + ((path_info.media_type == '') ? 'none' : path_info.media_type);
	sub_list.appendChild(mt);

	for (let node of path_info.contents)
		sub_list.appendChild(displayPathInfo(node));

	return frag;
}

function scanFolderResponse(data)
{
	let error_container = document.querySelector('#error_container');
	let info_container = document.querySelector('#info pre');
	let main_container = document.querySelector('#main_container ul');
	resetContainers(error_container, info_container, main_container);

	if (data.errors) {
		for (let err of data.errors) {
			error_container.appendChild(document.createTextNode(err));
			console.log(err);
		}
	}

	if (data.mem_usage) {
		info_container.appendChild(document.createTextNode(
			'memory usage: ' + data.mem_usage + ' bytes')
		);
	}

	if (data.path_info) {
		console.log(data.path_info);
		main_container.appendChild(displayPathInfo(data.path_info));
	}
}

window.onload = function () {
	if (!('fetch' in window)) {
		console.log('no fetch API');
		return;
	}

	let scan_button = document.querySelector('#scan_button');

	scan_button.addEventListener('click', function(e) {
		fetchJSON(SCAN_URL, scanFolderResponse);
	});
}